Blowpipe fob



J. HARRIS.

LowPaPE Foa WELDING MACHINES.

.A50 M .I

APPHCATION FILED SEPT. l. 1917.

UNITED STATES PATENT OFFICE.

JOHN HARRIS, or LAKEWOOD, onio, AssrGNon on ONE-HALF 'ro JAMES n. nosn, or Y nneiiwonfrn, PENNSYLVANIA.

BLOWPIPE FOR VELDINGr-/IACHINES.

Application, led September 1, 1917.

To all whom z5 lmay concern.'

Be it known that I, JOHN HARRIS, a citizen of the United States, residing at Lakewood, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Blowpipes for IVeldingMachines, of which the following vis a full, clear, and exact description, refer,-

ence being had to the accompanying drawin s.

"his invention relates generally to. blow pipes for weldingmachines andhas for its object they elimination of certain objections to the blow pipes now employed in connection with welding machines.

First of all the tips of the present types of blow pipes are provided with a series ot Aindependent jet openings `through which.

the preheat-ing gas emerges producing a se.- ries of separate independent flames spaced apart a suiiicient distance to permit the iniifux ot air therebetween and this influx of aii,containing as it does so large a proportion of nitrogen gas, retards the preheating and welding operations. One portion of my invention, therefore, comprehends the iinprot/ement in Ithe constructionr ofV a tip feature is avoided. Furthermore in all welding blow pipes of which Iam aware it has been custernary to commingle acetylene gas with oxygen for the purposeV of producing the preheating and welding llames. VIn a Ylarge number of plants in which oxygen is thus employed an electrolytic device or apparatus is employed for the purpose of splitting up water into hydrogen and oxygen in order to obtain the oxygen and the hydrogen thus liberated has ordinarily been discarded-` The object of my invention, therefore, is to utilize this hydrogen thus generated during the electrolytic process thereby econoniizing in the use of gas and dispensing with the use of acetylene in producing the preheating mixture, keeping the acetylene gas for use incombination with oxygen to produce the welding Haine. In this manner I economize with the use of gases inasmuch as I provide a pipe 'capable of using a gaswhich has heretofore been discarded. Vith these andlother objects in view the invention consists in the details of construction and novelties of combination hereinafter fully described and set forth'in the appended claims.

In the drawings Jforming a part of this Speciiication of Letters Patent.

' Patented Nov. 23, 1.920.

serrer No. 183,242.

Figure'l is a` vertical sectionalview of the blow pipe; 2 is a horizontal :sectional view on the'line 2-2 of Fig. 1; Fig. 3`i'sa aiicFig. shows a slightlymodiiied form o ip. y

In kconstructing a blow pipe of the tvpe illustrated in the drawings I emplOyf valve casing 10 consisting of two portions which may be cast integral or rigidlyconnected together in any suitable manner and these round castings or casings are provided with a gas passage or bore 11 for hydrogen or any other combustible gas, and passages 12 for oxygen and a passage 13 for. acetylene. These passages are controlled by means of valves 14:. Gas supply pipes lead into these passages Aand leading therefrom are the tubes 15, 16 and 17, the tube V15 being intended to convey hydrogen or other combos tible gas which passes through the bore or passage 11 and the tubes 16 convey oxygen passing through the bores or passages 12, while the tube conveys acetylene passing through the bore or passage 13. Ajspreviously stated the valve castings or 'easings 10 are in two sections and the tubes 15 and 16 of one section are connected at their lower ends to a block 18 while the tubes 1G and 17 'of the othersection are vconnected at their lower ends to a block 19 and these ltubes are surrounded by suitable sleeves 2O and, ify

recess 23 produced in the bottom of the block 18. A nozzle 2d having an enlarged and beveled end 25 is connected to the block 18 by means of a gasket 26, this nozzle hav-` sectional viewv on the line 3 3 of Fig. 2;

ino

sages 21 and 22 communicate with. a central Y ing a central bore 27 slightly enlargediat its upper end as shown at 28 and into which projects the injector tube 29 arranged at the end of the oxygen pipe 1,6.l 30 indicates a tir @entractdn @De directive aadharing viie an elongated slot or opening a in the bottom thereof, and through which the 'commingled oxygen and hydrogen or other comby means of the gasket 36 and the lower end of this combined nozzle and tip is not only vcontracted but it is also curved as shown at 37 and the extreme end thereof is projected adjacent to the end of the tip 30 but slightly below the same. This combined nozzle-and tip is intended to deliver the commingled oxygen andl acetylene gases for producing the welding flame and this flame is projected in the proper direction in theform of a fine jet which meets or nearly meets the thin elongated preheating flame of thev combined oxygen and hydrogen gases.

In Fig. 4I have shown a slightly modied form of tip 40 having an elongated slot or opening 41 in the bottom thereof and which extends nearly the entirewidth of the tip. At one side, said tip is yformed with a downwardly extending portion 42 havinga single opening 43 in the bottom thereof and at one side a connection -44 is provided for the attachment of a nozzle or tube leading the commingled oxygen and acetylene to this extended portion of the tip, the object of this combination tip being to provide in one device the two separate devices of the construction shown in Fig. 1, the operation being exactly the same in both cases.

By means of theblow pipe constructed as herein shown and described, it is obvious that I eliminate the objections of the blow pipes now in use in which separate and independent preheating jets are employed and which jets are spaced apart a suflicient distance to permit the influx of air. It will also be .seen that by means of my improved blow pipe I am able to economize in the use of acetylene andcan employ the hydrogen from an electrolytic device, and which has heretofore been discarded, or I may employ natural or any other combustible gas in connection with oxygen to provide the preheating llame thereby economizing in the" use of acetylene. v

While I have specified acetylene as the gas best adapted for comminglingwith oxygen lto produce a welding flame it will be understood that I do not limit myself to this particular gas but may use any' suitable combustible gas which-will combine with oxygen and produce an efficient welding flame.

Having thus described my invention, what I claim is 1. In a blow pipe for welding machines, the combination with a tip having an elongated slot in the bottom thereof, a nozzle to which said tip is attached, means for supplying oxygen and a combustibler gas to said nozzle and tip, and a second tip adapted to receive oxygen and acetylene and having its discharge end adjacent to the end of the first mentioned tip and projecting slightly below the same.V j

2. In a blow pipe for welding machines, the combination with a tip having an elongated slot in the bottom thereof, a nozzle to which said tip is connected, and means for supplying commingled oxygen and a combustible gasto said nozzle and tip, a second tip adapted toY receive commingled oxygen and acetylene gases, the discharge end of said tip being` arranged adjacent to "the first named tip and projecting at an angle thereto.

3. In a blow pipe for welding machines the combination with a tip having an elongated slot in the bottom thereof and adapted to receive commingled oxygen and a combustible gas, of asecond tip adapted to receive commingled oxygen and acetylene gases, the discharge end of said second tip being arranged adjacent to onecnd of said first named tip and projected at an angle thereto and extending slightly below the lower end of said first named tip. y

4. In a blow pipe for welding machines, the combination of two separatev tips', one of said tips having an elongatedslot in the bottom thereof and Vadapted to receive commingled oxygen and a combustible gas, the second tip having a contracted discharge end, said discharge end being projected toward and adjacent to the end of the first named tip, the discharge 'end extending slightly below the lower end of the first named tip. Y 1

5. In a blow pipe for welding machines,

vthe combination of a valve casing having oxygen and acetylene gas supply pipes leadioo ing thereinto and also a gas Ypipe adapted to Y convey ay combustible gas other than acetylene, tubes leading from said valve lcasing and conveying said gases, valves for controlling the flow of gas through the v`casino,

lblocks-to which the tubesV are connected, eac

bloek'having a recess, the recess in one block receiving commingled oxygen and a combustible gas, the'recess in the other block receiving commingled oxygen and acetylene,

` a .nozzle connected to each block. and conveying Vthe commingled gases to a tip at the end thereof.' Y

6. In a blow pipe of the kind described the combination with'a tip having an elongated slot in the bottom thereof and adapted to` receive commingled oxygen and arcombustible gas to produce a. preheating flame, of a second tip adapted to receive commingled oxygen and a suitable combustible gas, the Y discharge end of said second tip being arranged adjacent to one end of said rst 5 named tip.

7. In a blow pipe of the kind described the combination with a tip having an elongated slot in the bottomi'thereof and adapted to receive commingled oxygen and a combustible 10 gas to produce a preheating flame, of a second tip adapted to receive commingled oxygen and a suitable combustible gas, the discharge end of said second tip being arranged adjacent to one end of said first named tip and projected at an angle thereto and eX- tending slightly below the lower end of said first named tip.

In testimony whereof, I hereunto allix my Signature.

JOHN HARRIS. 

